Adjustable fixture-stud for electric-conduit outlet-boxes.



W. S. EARHART.

ADJUSTABLE FIXTURE STUD FOR ELECTRIC OONDUIT OUTLET BOXES.

APPLICATION FILED OGT. 10, 1911.

Patented Oct. 1, 1912.

awvewto'o S. Ealimri WILLIAM S. EARHABT, OF QENVEB, COLORADO.

ADJUSTABiJE FIXTURE-STUD FOR ELECTRIC-CONDUIT OUTLET-BOXES.

. Specification of Letters Patent.

' Patented Qct. 1,1912.

Application filed October 1Q, 1911, Serial Zia 653,879.

To alliwhom it may concern:

Be it known that I, WILLIAM S. EARHART;

a citizen .of-the United States, residingat Denver, in the county of Denver and State of Colorado, have invented new and useful Improvements in Adjustable Fixture-Studs for Electric-Conduit Outlet-Boxes, of which the following is a specification. This invention relates to adjustable 'fixtur studs adapted .for use in connection wit conduit outlet boxes where same -is.out

'of .alinement and also where the outlet box is level, to correct an inalinement in the threading of insulating joint and' fixture stem which wouldcause fixture to ,hang out of plumb, even though attached to a level outlet'box; the aboveadjustable stud will remedy-any of these imperfections and cause the 'fixtureto hang. .perfectly .plumb and solid, which makes a job pleasing tothefeye andsatisfactory, E Another-object of the invention is the provision of novel means for adjusting or alinin fixtures withoutrequiring-the stud to be ad usted by washers ,or strips of metal slipped under the lugs of the high side of the ordinary fixture stud. This usually re-- qii-ires'a tripor'two up and down the step ladder to see when the fixture is plumb, and even then itis only temporarily accom "pl i'shed for with the ordinary handling of the fixture in turning on and off the lights the fixture works. loose, the washers drop out and an imperfect job is the inevitable outcome. With the above adjustablestud the entire 0 eration of hanging, alining the fixture and soldering the outlet wires can be done with one'trip on the ladder.

Another object,of the adjustable fixture stud is the novel means of hanging fixtures so they will remain solid with the ceiling su ort and will not work loose.

ith these objects in view and others, which will appear as the description roceeds, the invention comprises the various novel features of construction and arran ement of parts which will be more fully es scribed hereinafter and set forth with particularity in the claims appended hereto.

In the accompanying drawing, which i1- lustrates one embodiment ofthe invention: Figure 1 is a side elevation of the fixture stucl or bolt. Fig. 1" is a bottom planview thereof. Fig. 2 is a side elevation of the reducing-bushing. .Fig. .2 is a bottom plan desired with reference to base of on of theadjustable spider. Fig. 4 is a side elevation thereof. Fig. 5 is a sectional view ofan outlet box or pan with the parts assembled therein.-- Fig. 5" is a side elevation of an'ordinary insulatingjoint. Fig. 6 is a bottom plan view. of anordinary outlet box with the .conduit pipes entering same and .the' adustable fixture stud in position.

Simi ar reference characters are employed to designate corresponding parts throughout the views. i j

- Referring to't-hedrawings, 7 designates I view thereof.' Fig.3 is.a bottom plan view the. body fofthe adjustabl'e'stud or bolt,

which is formed of metal, thestud b ing ex-fl ternallygthreaded on itsreduced end 8 and made" conical at the opposite end 9,so as to permit of the stud being swung'at an angle that box. The reducing bushing 10 is hexagonally formed at the top 12 so as to permit of the use of a .wrench or pliers if necessary in tightening or removing same from insulat in ointwlien the fixture for any cause is ta (en down. The reducing bushing is externally threaded to engage a three-eighths inch-standardinsulating joint, and internally threaded so. as to engage an ordinary one-eighth inch pipe thread on the end 8 of the stud 7. i

13 in Figs. 3 and 4 denotes the adjustable spider which has a central passage 14 and adjusting screws15 at the four extremities.

Figs. 5 and 6' show the adjustable fixture stud attached to the ordinary electric conduit outlet box. The stud 7 passes through the central passage 22 of the outlet box, and

. the portion 8 throughthe central passage l l of the spider and en ages the internally threaded reducing bus ing 10 causing the 5 spider to be held firmly in place against shoulder 23 when the reducing bushing P-= screwed up sufliciently. The external three a. of the reducing bushing is adapted to receive the standard three-eighths inch insulating joint at 19 and 20. The fixture can be alined after being attached to the reducing bushing 10 by means of the rounded surface oz the stud at Q which permits of the stud l7?"- ing swung at any angle.

18 in Fig. 6 is the bushing on the pip ra terin the outlet box, which are no in. F1 5. The s ider and bushing; o left 0 until all t e lock nuts and e e are put on the ends of the conduits entcrix the'outlet box, then it will not interfere with any of the operations of fitting the conduits to outlet box.

From theforegoing description, taken in 5 connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the apparatus which I now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative, and that such, changes may be'made when desired as are within the scope of the claims appended hereto.

Having thus fully described the invention as well as the article which is on the market at the present time, what I claim as new',

is :-1- 1. In combination, an outlet box having an apcrtured and threadedstud having a conical head seated in the aperture, a shoulder formed on the stud, a cruciformed plate mounted on the stud, a reducing coupling adapted to hold the plate against said shoulder, and screw threadedmto each end of the late and adapted to engage the box and so hold? the stud in adjusted angular position with relation to the box.

2. An adjustable 'fixture stud consisting of a hanger plate, a member having a universal connection with said plate, a second plate having a plurality of angularly disposed arms secured to said member with the arms radiating therefrom and screws threaded through the ends of said arms and enga ing the first plate to adjustably hold said first member against movement on said plate. 40

3. An adjustable fixture stud comprising a hanger plate having a central opening, a headed member disposed in the opening of said hanger plate and having universal connection therewith, a cruciform plate disposed against said headed member, a second member bearing against said cruciform plate and threaded on said headed member and screws threaded through the ends of the arms of said cruciform plate to adjust the relation of said headed member on said hanger plate.

4. In combination, .a hanger plate, a member having a conical head extending through the hanger plate and having universal connection with the hanger plate by said coni- 65 cal head and means carried by said member for holding the same in various adjustable positions with respect to the ha er plate.

5. In combination, a hanger p ate havmg an opening therein, a'member havin a. conical head universally adjustable in said opening and supporting said member onsaid hanger plate, a device mounted on said memher, and means carried b said device and adapted to hold said mem er in var1ous..adjusted positions on said ha er plate.

In testimony whereof I a x my signature in presence of two witnesses.

WILLIAM S. EARHART.

Witnesses:

CHARLES R. BOSWORTH, Iavmc R. Cowuas. 

